Spinning bucket



H. D. HALEY 2,492,426

SPINNING BUCKET Filed Nov. 12, 1947 INVENTOg. HUGH D. HALEY PatentedDec. 27, 1949 UNITED STATES PATENT OFFICE American Viscose Corporation,

Wilmington,

DeL, a corporation of Delaware Application November 12, 1947, Serial No.785,340

14 Claims.

This invention relates to an improved metal spinning bucket.

Metal spinning buckets have been used for the collection of freshly spunfilaments, such as those obtained from the coagulation of viscosesolution in an acid coagulating bath, but considerable difliculty hasalways been encountered in suitably protecting such a bucket from thecorrosive liquids introduced by the filaments collected therein. It hasheretofore been suggested to protect such buckets with acorrosion-resistant coating but such coating has been found to beunreliable, particularly wherever perforations are present in the wallor rim of the bucket. Either the coating failed to penetrate through theentire bore of such perforations or it is non-uniformly applied so thatit wears away soon after the bucket is put into operation. To avoid theprovision of perforations through the wall of the bucket, other meanshave been suggested to cope with the problem of getting rid of liquidsintroduced into the bucket by the filaments when metal buckets are used.For example, a grooved liner has been suggested. Holeswere previouslytried in the lid for the purpose of getting rid of the liquid introducedinto the box by the filaments, but this has been found unsatisfactory,as the rubber rings have to be made of a small diameter or slotted inorder to allow the liquid to slide up the inside taper of the box toescape around the outside of the ring and through the holes in the lid.Again, it has been proposed to provide a large bore in the bucket wallwherever a small perforation is desired and to fit a perforated plug ofcorrosion-resistant material within such bore. All of these systems arerelatively complicated and increase the initial cost and maintenance ofsuch metal buckets.

It is an object of the present invention to provide an improved metalbucket which is effectively protected from corrosion and yet is ofsimple construction and adequately takes care of the discharge ofliquids introduced therein by the filaments.

In the drawing, which is illustrative of the invention,

Figure 1 is an axial cross section through a bucket formed in accordancewith the present invention,

Figure 2 is a plan view thereof,

Figure 3 is a section on line IIIIII of Figure 2, somewhat enlarged, and

Figure 4 is a plan view of a segment of the bucket rim somewhatenlarged.

As shown in the drawing, the bucket of the present invention comprises asolid unperforated wall 3 extending from a bottom 4 similarlyunperforated and terminating in a rim 5. The bucket is an integralstructure made of any. suitable metal, such as stainless steel,titanium, or preferably a light metal or light metal alloy such asaluminum, magnesium or aluminum or magnesium alloys, or the like and itsinternal surface may be provided with a taper in conventional fashion sothat the yarn cake formed therein may be readily removed by virtue ofthe larger internal diameter near the open end of the bucket. The entirebucket is covered with a coating of lacquer or equivalent materialhaving corrosion-resistant properties. A lacquer of phenol-formaldehyderesin such as Bakelite or Heresite, chlorinated rubber, rubber itself,or equivalent rubbers, resins, or synthetic rubbers or resins of thevinyl type including those known by the trade name of Tygon.

Within the rim of the bucket it is formed with a shoulder or seat at 6to receive a cover or lid 1 provided with a central opening 8 to permitthe introduction of the filamentary material such as by means of aconventional funnel guide. A groove 9 is provided adjacent theshouldered portions to receive a retaining member, such as the ring l0of rubber which serves to hold the cover in position. The bottom of thegroove is preferably arcuate though it may be straight if desired. Oneor more grooves or notches H extend from the open end of the rim 5 tothe groove 9 or even to the seat 6. As shown more clearly in Figures 3and 4, the bottoms of these grooves II are preferably tangent to thegroove 9 at its deepest portion as measured from the center of thebucket though, if desired, it may be deeper than the groove 9. Thebottoms of the grooves ll may be parallel to, but are preferably slopedfrom the parallel to, the axis of the bucket so that they become fartheraway from the center of the bucket as the open end of the rim isapproached. These grooves preferably have an arcuate bottom as viewed intransverse crosssection and the slope of their bottom is preferably from1 to 5 from the parallel to the axis of the bucket.

The provision of the axial grooves l l extending from the deepest partof the groove 9 for the cover-retaining means, which may be a ring ofrubber or the like, has been found to provide adequate discharge of theliquid from the bucket. In addition, the entire surface of such groovescan be readily and uniformly coated with the .sumption of power duringoperation is reduced to a minimum. This power-consumption is alsodesirably reduced as a concomitant of the ability to employ a relativelystrong bucket made of thin metal. There is also a slightly greateramount 7 of acid retained in the cake in a box without drainage holes,which also permits the cake to be removed more easily.

It is to be understood that changes and variations may be made withoutdeparting from the spirit and scope of the invention as defined in theappended claims.

I claim:

1. A metal spinning bucket of which the bottom, wall, and rim are freeof perforations, said buckethaving an annular seat within its rimadapted to receive a cover, a groove on the inside wall of the rim forreceiving means for retaining the cover in position, and a plurality ofshort grooves extending from the open end of the rim in a generallyaxial direction along the inside wall of the rim clear through to thefirstmentioned groove, the bottom surfaces of the short grooves beingdisposed at a distance from the central axis of the bucket at least asgreat as the radius of the bottom of the first-mentioned groove, saidbucket having all of its surfaces including the walls of the groovesprovided with a coating of corrosion-resistant material.

2. A spinning bucket in accordance with claim 1 in which the shortgrooves have their bottoms parallel to the bucket axis.

3. A spinning bucket in accordance with claim 1 and in which the axialgrooves have their bottom surfaces sloped away from the parallel to thebucket axis so that the bottom of said grooves is farther from such axisat the end of the bucket rim.

4. A spinning bucket in accordance with claim 1 'in which the bottomsurfaces of the short grooves are tangent to the bottom ofthefirstmentioned groove.

5. A spinning bucket in accordance with claim 1 in which the bottomsurfaces of the short grooves are deeper than the bottom oftheflrst-mentioned STOOVB.

6. A spinning bucket in accordance with claim 1 in which the bottoms oithe axial grooves are inclined between 1 and 5 from the parallel to thebucket axis so that the bottoms ofsaid grooves are farther from suchaxis at the end of the bucket rim.

. 7. A spinning bucket in 6 in which the metal is a light .metal alloy.

8. A spinning bucket in accordance with claim 6 in which the metal isaluminum.

9. A spinning bucket in accordance with claim 6 in which the metal is analuminum alloy.

10. A spinning bucket in accordance with claim 6 in which the metalcomprises magnesium.

11. A spinning bucket in accordance with cia'im 6 in which the metal isa magnesium alloy,

12. A spimiing bucket in accordance with claim 6 in which the metal is astainless steel.

13. A spinning bucket in accordance with claim 6 in which the bottomsurfaces 'of the. short grooves are tangent to the bottom of.the firstmentioned groove.

14. A spinning bucket in accordance with claim 6 in which the shortgrooves extend to the an nular seat.

HUGH D. HALEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS accordance with claim

